In all 3 worlds the music starts and within 2 seconds stops. Other sounds are heard throughout the game but not the music. I don't see any error messages in the game console window as well.
The 2 new worlds looks great.

One feature I would like is a shortcut key for quick restart of the game. Currently if I want to restart a game, I need to pause, quit game and start the game again. Another feature that would be good is to hide the mouse cursor in the game. I miss these 2<snip>

Works wonderfully in my windows 8 laptop. Will try it in Ubuntu 64 bit later in the day. Controls are the way I feel they were.
One little glitch that I found is that I started the game in windowed mode and then while flying I pressed f11 to go full scree<snip>

@rychan Played the rom in fceux-2.1.4a-win32-444 and then played Flappadiddle and had the same game feel. The canary wing flap is done very well. To fly had to use "F" key and not "A" key. Great work looking forward to the future versio<snip>